[michaelc]

The C9 is only overly hot with

Class A and Tube

The longer it is on in this mode, the hotter it will get. The class AB is only warm and not hot

What is the differences btw class A and AB?

 

[Whitigir]

What is the differences btw class A and AB?

You can search for it. The topic is a big one. Here is an example
https://www.sweetwater.com/insync/class-vs-class-ab-guitar-amps/

 

[zen87192]

Edit: I am thinking MEST MKii is generally a safer bet if you do not have a super strong preference for a very specific kind of music, and it has a really good synergy with C9. In fact, Cayin and UM are from the same city and their employees have a very good relationship. I wouldn’t be surprised if the tuning of MEST is done with Cayin’s products. (Attached pic is from UM’s official Weibo).

bluestorm1992, I have now made up my mind of the UM Mest MK2.... Now just need to gather the nerve to drop 1500 on IEM's! My most expensive IEM so far is 300

 

[RTodd]

bluestorm1992, I have now made up my mind of the UM Mest MK2.... Now just need to gather the nerve to drop 1500 on IEM's! My most expensive IEM so far is 300

 

[zen87192]

Yup... I'm walking a 'Rocky' road!

 

[DaYooper]

I was trying to come up with some sort of clever response but the rocks in my head aren't really warmed up yet.

 

[zen87192]

yeah...one needs to be 'Boxing' clever in this Audio 'Ring'!

I'll get my coat...

 

[RTodd]

yeah...one needs to be 'Boxing' clever in this Audio 'Ring'!

I'll get my coat...

Adrian

 

[Whitigir]

Class A is amplifying the original as is, and class AB trade off some of those original amplification for engineering voodoo hoodoo to gain more efficiency.

this voodoo engineering is the implementations of the architecture, the sound will be effected. Because sound is subjective , some people may like AB and some people will prefer class A. There is no right or wrong

regardless, the fact remains, that Class A is wasting a lot of power but it fully amplifying the original signals as is, where AB has some “cheats” to gain efficiency

 

[lucasratmundo]

Delivered yesterday! I'm still going through my headphone and IEM collection with it but it's a noticeable upgrade from SP2000 for my IEMs (especially the MEST and Z1R) in terms of soundstage. It can drive all my headphones (Clear, Arya and Diana V2) super well. My preferred default mode is Tube + Class A so far, but I'm still exploring.

 

[bluestorm1992]

bluestorm1992, I have now made up my mind of the UM Mest MK2.... Now just need to gather the nerve to drop 1500 on IEM's! My most expensive IEM so far is 300

Go for it! C9 is such a great source and it deserves the best.

 

[HiFiHawaii808]

bluestorm1992, I have now made up my mind of the UM Mest MK2.... Now just need to gather the nerve to drop 1500 on IEM's! My most expensive IEM so far is 300

Dude, go for it. You have the best AMPs in the market. You have no idea what is in store for you. The MEST MKII is just the first step in a long journey toward sonic bliss. With that purchase, you are just scratching the surface of what is possible with IEMs.

Next, you need to try a ZMF Verite Closed with that Primaluna EVO 400.

 

[bluestorm1992]

Just to add, MEST could be a really good choice because: (1) it is priced much more reasonably than many 3k IEMs while delivering a TOTL experience especially if you are into holographic soundstage; (2) it can really benefit from C9. Not all TOTL IEMs pair well with C9 (although I have found most of them do).

 

[zen87192]

ooooooo..... I see they are in stock at MusicTeck and 4.4mm is available.... twiddle fingers.... twiddle figers....

 

[bigbeans]

ooooooo..... I see they are in stock at MusicTeck and 4.4mm is available.... twiddle fingers.... twiddle figers....

...well?